Floyd ‘Money’ Mayweather is known for splashing the cash, having earned more than US$1 billion during an illustrious boxing career that saw him retire undefeated after winning all 50 professional fights. Photo: AP

Floyd ‘Money’ Mayweather is known for splashing the cash, having earned more than US$1 billion during an illustrious boxing career that saw him retire undefeated after winning all 50 professional fights. Photo: AP